document.write( "Question 620573: What is the equation of a line in slope intercept form that has the endpoints of (3,6)and (7,-2)?
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Algebra.Com's Answer #390254 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Note: is the first point . So this means that \"x%5B1%5D=3\" and \"y%5B1%5D=6\".\r
\n" ); document.write( "\n" ); document.write( "Also, is the second point . So this means that \"x%5B2%5D=7\" and \"y%5B2%5D=-2\".\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\" Start with the slope formula.\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28-2-6%29%2F%287-3%29\" Plug in \"y%5B2%5D=-2\", \"y%5B1%5D=6\", \"x%5B2%5D=7\", and \"x%5B1%5D=3\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28-8%29%2F%287-3%29\" Subtract \"6\" from \"-2\" to get \"-8\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28-8%29%2F%284%29\" Subtract \"3\" from \"7\" to get \"4\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=-2\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "So the slope of the line that goes through the points and is \"m=-2\"\r
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\n" ); document.write( "\n" ); document.write( "Now let's use the point slope formula:\r
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\n" ); document.write( "\n" ); document.write( "\"y-y%5B1%5D=m%28x-x%5B1%5D%29\" Start with the point slope formula\r
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\n" ); document.write( "\n" ); document.write( "\"y-6=-2%28x-3%29\" Plug in \"m=-2\", \"x%5B1%5D=3\", and \"y%5B1%5D=6\"\r
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\n" ); document.write( "\n" ); document.write( "\"y-6=-2x%2B-2%28-3%29\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"y-6=-2x%2B6\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=-2x%2B6%2B6\" Add 6 to both sides. \r
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\n" ); document.write( "\n" ); document.write( "\"y=-2x%2B12\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "So the equation that goes through the points and is \"y=-2x%2B12\"\r
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